Abstract.
Polymer particles containing oil-soluble dyes (colored latex particles) were prepared by mini-emulsion polymerization. Copper phthalocyanine dyes and styryl dyes were used as oil-soluble dyes. Highly hydrophobic dyes played the role of hydrophobe by themselves and enabled the full incorporation of dyes in the latex without additional hydrophobes. Two phthalocyanine dyes having similar color were blended in a mini-emulsion polymerization so that the resulting colored latex showed enough strong color depth as a colorant. Colored latexes with high dye content (more than 30 wt% for phthalocyanine dye system and 40 wt% for styryl one) and with particle size less than 100 nm were obtained.
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Acknowledgements.
The authors thank Dr. J. Ooizumi (Mitsubishi Chemical Co.) for the SAXS measurement and his helpful comments. This work was supported by a grant-in-aid for the 21st century COE program (KEIO LCC) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
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Takasu, M., Shiroya, T., Takeshita, K. et al. Preparation of colored latex containing oil-soluble dyes with high dye content by mini-emulsion polymerization. Colloid Polym Sci 282, 119–126 (2003). https://doi.org/10.1007/s00396-003-0902-5
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DOI: https://doi.org/10.1007/s00396-003-0902-5